#include<stdio.h>
union Un
{
	int a;
	char c;
};
struct St
{
	int a;
	char c;
};
int main()
{
	union Un u;
	printf("%d\n", sizeof(u));

	printf("%p\n", &u);
	printf("%p\n", &(u.a));
	pritnf("%p\n", &(u.c));
	return 0;
}